- #36

- 50

- 2

1 - cos^2(10) + sin^2(10) = 2sin^10 because cos^2(10) + sin^2(10) = 1sea333 said:sqrt(4a^2sin^2(10)) = 2*a*sin10

How do you get from 1 - cos^2(10) - sin^2(10) to 2 sin^2(10) ?

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In summary, the electric force is equal to the horizontal component of the tension, the weight is equal to the vertical component of the tension, and T=\sqrt{(mg)^2+F_e^2}.

- #36

- 50

- 2

1 - cos^2(10) + sin^2(10) = 2sin^10 because cos^2(10) + sin^2(10) = 1sea333 said:sqrt(4a^2sin^2(10)) = 2*a*sin10

How do you get from 1 - cos^2(10) - sin^2(10) to 2 sin^2(10) ?

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